Ok so I have ran the stress test using BurnIt Test and it reported no errors except from my optical drive which I already knew about, Then I ran just the CPU test and after a few mins the computer displayed a blank screen and then shutdown just the same as FSX, this is the first time it has done this outside of FSX so im guessing its the CPU overheating it displyed temps of 90 centigrade. So I guess I should try the heat sink paste thing or is there any other way of cooling my CPU and by the way its a laptop not a desktop, Thanks.